Device for clamping the threads of a warp



r The present-invention has, for its a device for clamping Warp threadsacomb element so disposed that D I F R LAMP- st THREADS Q OFAWARP AloisAltenweger, Uster, Switzerland, assigiior to-"Zellwege'r A.G.,Apparateund Maehinentahriken. Uste'r, Uster, Switzerland, a corporationof Switzerland Fired J l s asset N9 1 1 552- c 1 '1; Claims priority,application Switzerland sepn 10, 1951 1 Claims. cm-n e provision ofcomprising the warp lie respectively inthe teethcornprising said comband also includes a tensioning means which acts to press the warpthreads against suitable elements which act as'pressure pads and whichare normally integral or form a unitary structure with hich Ele'vrclncludes 1 2,942,324 ?etente. Jun 2 1- 60 of the thread blocking meansshown, it is also possible to close the spaces between the comb teethand prevent the warp threads from slipping out of position by placing acover over the points of the comb teeth.

Such a comb is particularly useful if it can be employed as a part ofWarp clamping means during the tying of the warp with the aid of a'warptying" machine.-

For this purpose the comb teeth '1 are provided with surfaces 6 and 7against which abut corresponding. parts of a clamping device. Thisclamping device comprises,

. for example, a generally rectangular profiled hollow bar or sleeveswhich contains a bar 9 of L-shapedprofile while is laterally movable anddisplaceable therein; The

bars S and '9 have jaw portions 19 and .11 respectively,

which can be brought closer together by movement toward e'achother whensawtooth faced or profiled rods -12 gand13, which liejwithinthehollowbar'8 and rest on and opposed motion of sawtooth-faced earns.12 and 13 f the comb teeth. Such warp clamping and tensioning devicesare commonly utilized in pairs when employed in connection with warptying machines, thread drawing-in machines and the like, so that theindividual threads comprising said warp may be presented to a threadseparating means in an orderly and parallel fashion so thatthey may "beseparated from the warp as individual threads fora subsequent operation.

Other objects of this invention, will appear from the following detaileddescription and the accompanying drawing.

. In the drawing, in which there is shown a preferred embodiment'of anapparatus designed and constructed in accordancewith the presentinvention:

Fig. l is 'a sectional view of the device of this invention taken acrossthe longitudinal axis of the comb,

Fig. 2 is a lateral and front elevational view of said device takenalong the length of the comb, saidview also being partly in section, and

Fig. 3 is a plan view of a portion of the thread tensioning means ofthis invention, which view is taken in a direction vertical to the planeof the warp.

Like numerals indicate likeparts throughout the several j a 7 views ofthe drawing.

The comb vwhich forms one of the essential elements the horizontalportionofthe L-shaped ban .are moved oppositely and preferablysimultaneously in the direction shown by each of the arrows in Fig. 3.This simultaneous in Fig. 3, the jaw 11 moves to the left and, as aconsequence,'the comb is forced downward into the clamping means. Thejaws 10 and 11 thereby exert a pressure on the warp threads ,4 which arethus held against the surfaces 14 and 15 of the sleeve 3 which is firmlyand rigidly attached to the comb teeth 1.

The surfaces 14 and 15 are advantageously so designed that they liesubstantially in but a single plane and so that of the device of thisinvention comprises, as shown in Figures 1 and 2, a plurality of teeth lindividually having root portions which are separated from each other bymeans of spacing elements 2 and are also held in position by means ofanoblong rectangular element or sleeve 3 which surrounds the feet orroot portions of the teeth 1. On both ends of each comb there areprovided suitable locking elements (not shown) which prevent the severalteeth and the spacing elements 2 which separate the teeth from fallingfrom the open ends of sleeve 3. The length of the comb is equal to atleast the width of the warp being acted upon. The comb can be so placedin position in cooperation with a warp held under tension that thespaces between the teeth 1 may contain one or more warp threads 4 asshown in Fig. 2.

' associated with saidcomb for pressing the warp threads I received inthe gaps between the teeth of the comb against.

In the embodiment of the clamping device shown" in the drawing, theseveral teeth 1 are each provided with a'hol'e through which a circularrod 5 which is "equal in length to the comb, can bepassed after the warpthreads have been placed in, position between the comb teeth. In

place the comb ,into' the warp aslong as it is on'a finishing thismanner it is possible, among other operations, to

is possible to cover either the surfaces 14 and 15 ,or the v jaws 10 and11 with a fiexibleor yielding material or to form them of such amaterial. This expedient is preferred since the use of such a flexiblematerial as a surface allows a certain amount of distortion and permits.warp'threads of quite different countsto ,be held in V clamped positionin the same place.

What is claimed is: a a

1. A device for clamping the threads of a 'warp com- I prising a combincluding an oblong element and spaced teeth extending therefrom andforming gaps receiving the warp threads, and movable clamping meansoperatively said oblong element.

2. A device as defined in claim 1 in which said teeth and said movableclamping means have corresponding surface portions slidably engaging oneanother and guiding said movable clamping means into the thread clampingposition. i

; .3. 'Aldevice according to claim lin which said teeth individuallyhave afree end :and a root portion received in said oblong element andaportion whose extension, f seen in the longitudinal axis; of the comb,increases in the directionaway from said root portion, for forminginclined surfaces on said teeth laterally of the comb, said clampingmeans being movable towards and from the sides of' said comb and havinginclined surfaces cor- 3 responding to and slidably engaging saidinclined surfaces of said teeth for moving said comb in the directiontowards the free ends of the teeth and pressing said element againstsaid clamping means.'

4. A device according to claim 1 in which said oblong element has asubstantially plane surface portion on which lie the warp threadsreceived between said teeth, said surface portion being locatedsubstantially in the plane formed by the warp threads, and said clampingmeans pressing the warp threads against said surface portion.

5. A device according to claim 1,' including closing means removablyextending through said teeth for closing thegaps between the teeth andretaining the warp thread in the gaps; '1

6. In a warp clamping'device for clamping the several threads of a warpin substantially parallel arrangement, the combination of an upperhollow sleeve and a lower hollow sleeve, said upper hollow sleevecontaining the root portions of a plurality of spaced teeth extendingdownwardly into said lower sleeve thereby forminga comb substantiallycoextensive in length with said upper and lower sleeves and adapted toreceive warpthreads 4 therebetween, means cooperating with said teethand said lower sleeve for holding said upper and lower sleeves in fixedposition relative to each other and including adjustable clamping meanspositioned in said lower sleeve adapted to press upward against the warpthreads between the comb teeth and cause said threads to engage thelower. surface of the upper sleeve.

7. A warp clamping device in accordance with claim 6 wherein the warpthread clamping means in said lower sleeve comprises a jaw adapted topress upward against the warp threads on positive lateral displacementand cause said threads to engage the lower surface of the upper sleeve,and a pair of saw-toothed, horizontal cams in operative contact withsaid jaw for actuating said jaw intorupwardly pressing engagement by thedisplacement relative to each other of said cams.

References Cited in the file of this patent {UNITED STATES PATENTS

